Telephony.



No. 745,019. PATENTED NOV. 24, 1903.

I. KITSEE. I TELEPHONY.

APPLICATION FILED MARJ, 1991. 'NO MODEL,

' 1 5 SHEETS-SHEET l.

WITNESSES.- I N VENTOR:

ATTORNEY:

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No. 745,019. PATENTED NOV.24 ,1903.

I. 'KITSEE. TELEPHONY.

APPLICATION FILED MAR. 7, 1901.

ll U Q 7 WE R N0 MODEL.

5 SHB'ETSSHEET 3 PATENTED NOV. 24, 1903. I. KII'SEE. I TELEPHONY.

APPLIOATION FILED MAR. 7. 1901.

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, THE NaRRls PETLRS PATEN'J ZED NOV. 24, 1903.

I. KITSEE.

TELEPHONY.

APPLICATION FILED MAR. '1, 1901.

m MODEL.

N E RQS w e 5 W w r: nmm: PETERS Cm, WASHINGTON, n. c

UNITED STATES PATENT Patented November 24, 19 03.

FFICE.

TELEPHONY.

SPECIFICATION forming part of Letters Patent No. 745,019, dated November 24, 1903.

Application filed March 7,1901. Serial No- 50,2 3h. (No model-l T at whom. it ntrty concern:

Be it known that I, ISIDOR KITS EE, a citizen of the United States,,aud a resident of the city and county of 'Philadelphia, State of Pennsylvania, have invented certain new and use-' .nections, thereby reducing-the number of operations necessary in making connections and at the'same time making many of said operations automatic in their action. For a full, clear, and exact description of my invention reference may be had to the following specification and to the accompanying drawings, forming a part hereof, in which- Figure l is a diagram of my improved telephone system, showing two subscribers"stations, their corresponding plugs, and four movable connecting-plates in each board. Fig. 2 is a viewof the boards or panels coinprised in one operators set. Fig. 3 is a vertical section through one of the plug-switches. Fig. 4 is an elevation of one of the plug depressors or keys. Fig. 5 is a horizontal sectional view taken above one of the movable plates of the call-board. Fig. 6 isadiagraxnmatic View ot'one plug-switch each of the calling-board and the distributing-board,-

showing two subscribers stations connected thereto, respectively, and showing the parts in the position just after No. ls plug has been depressed, but before the plate was moved toward its operating-magnet. Fig. 7 isasimilar view showing both plugs depressed and the call-bell of No. 2 being rung, and Fig. 8 is a similar viewshowihg both stations connected for conversation.

A represents what I term a "Wall-boardthat is, a board to which the calls are pri to one distributing-board.

ma'rily sent and in the leads to which from each station a -dr op or other annunciator may be inserted to call the attention of the operator. B indicates a distributing-boardthat is, the board from which the call is sent to the station desired to'be connected to a station which has called up through the callboard. It is obvious that each outlying station must have a plug-switch in both the callboard and the distributing-board in order'to allow of any station being connected with any other.' :Since one operator cannpt attend to all the plugs or lines in one switchboard,- the call-boards are divided into sections, each consisting of a suitable number of plugs to be easily taken care of byoue operator, Several of these sections of the call-board may be placed opposite one distributing",- board and the latter may be duplicated until there is room for all the sections of the callb'oard'. This arrangement does not diifer from those in the well-known central-station practice of the present day. Fig.2 shows one section of the call-board audits corresponding distributing-board. In -this instance there would be six sections 0% the call-board to correspond The call and distributin g boards may be placed. in the same tertical frame; but this i s-n'ot essential, as they may be placed according to choice ,ahd convenience.

My improved connecting or switch boards are especially applicable to be used with the sorcalle'd central-energy telephone systems or those where a closed circuit is maintained to each telephone-station when the same'is not in use, although they may be adapted to be used with other systems. O and O are contact-plates which are located at'the limit of the outward movement of the plug E'and are connected, respectively, .with' the poles of a common main battery 1.

'lhe plug E is preferably of non-conducting material and is surrounded by the semicylindrical halves of the plug-socket D and lD,,to each of which is connected one of the leads from a telephone-station. The plug E has an extension E, which passes through an opening in the 'fixed plate Fandis adapted in connection with the parts D and D of the plugsocket to form a guide for the ;plug E A spring E interposed between the plate F and the bottom ofthe plug E, acts to return the plug to its normal or inoperative position.

G is alongitudinal contact carried by the plug E, which is adapted to form an electrical connection between the parts and D when, the plug is in its normal-or inoperative position.

- by rollers J or other suitable antitriction de H is a fixed plate of conductive material and is locatedadjacent the ends of the plugsockets, so that when the plug is depressed the contact G will make electrical connection between the same in Fig. 6. 1

I is a contact carried by the plug E, which is always in contact with the part D of the plug-socket and connects said part D with the and the part D, as shown part 0 when the plug isin its normal position.

J J, &c.,- are conductive .plates or frames, so connected as to be operative in pairs, one plate of each pair being located in the call'and distributing boards, respectively, and have slots J formed therein, through which the plugs E are adapted to pass. These plates are insulated fromeach other and are carried vices. They are held in their normal or inoperative positions by suitable springs J The plates J correspond to the cord connectors in the cord-circuit systems and are of a similar number-43o wit, about ten per cent..

of the number of stations connected to any one panel ofa switchboard. .The slots in the plates J are of sufficient length to allow either one of the pawls K or L to passtherethrough in either direction, according-to whether a plate is in its operative or inoperative position. The pawls .K and L have insulatingstrips K and L" uponpne side thereof, respec tively, so that in passingthe plates J in one vdirection no electrical contacts are made therewith.- The pawl L is held in its normal raised position by the spring-arm L, and the pawl K is adapted to rest upon the1springarm K by gravity when in its lower or inoperative position.

.K is a pin or projection carried by the pawl K and is adapted" to contact with the upper edge of the pawl L, so that when the pawl L is raised K will be depressed and when K-is raised L will be depressed. These pawlsK and L are pivoted lupon a pin K,

which has electrical connectibn with the contact I by means of the wire- 1. When the plug E is depressed, the pawl K will engage the first plate which isnot already in use to make a connection. This is due to the fact that the slots J are so located that when the plates J are moved by their magnets one end of the slot'will come into alinement with the .end of the pawl K and allow the same to pass without interruption. The pawl K will therefore engagethe first plate which is not in use,-

and as the inward movement of the plugE is continued the pawl K will be raised, thereby "tracted by the magnets.

depressing and-extending thepawl L. At the same time the uninsulated' part of the pawl K will contact with the plate and make a connection, as illustrated .in Fig. 6, to energize a magnet N todraw the plate into its operative position. over, the plate atthe opposite end of the slot passes over the end of the pawl L, which has been depressed, thereby making a second contact'with the uninsulated part of the same,-

As the plate J is drawn which maintains the action of the magnet N first energized, while at the same time the pawl K is allowed to' drop into its original position. The magnet N is energized by the battery V, the current passing through! the armature O,(hereinatter to be more particularly-described,') contact P, magnet N, plate .J, pawl L, wire I, contact I, and contact D to battery.V.

'O-' is an armature'which. is pivoted at 0 so as to be normally in contact with the point P, and is retained in that position by thearm J which in the plates of the call-board isinsulated, but in the distributing-board is electrically connected with the plate J. A clearing-out magnet 0- acts upon the armature O to withdraw it from the point P when the arm J 4 allows it to do'so by reason of the movement of the-plate J. The magnets O are electrically connected ingpairs' corresponding to the pairs of plates in the call and distributing boards and not energized until both receivers are off their hooks at the callingand the called-telephones. This ismade possible from the fact that the leads2 and 2 are connected to the parts D and D in each board,

respectively, which'will-allow the current to pass'through the contacts I, wires 1', pawls- .eeiverv hook-lever d, the point g being connected to bell i. a

Operation Supposing a call has been made from the station No. 1, the plug E in the'callboard is then depressed, thereby putting the groundj through the vibratingcall- Each telephone-stationis provided with the I pawl L in contact with the plate J, which is attracted by the magnet N, as above described. The operator at the call-board then ascertains from the subscriber at station No. -1 what other station he wishes to converse with and thereupon depresses the plug corresponding tothatrstation in the distributingboard. This is the condition supposed to exist in F ig. 7. When the plug E in the distrlbuting-board is depressed, the disengaged plate J, corresponding to the plate J just op Q. The bellat station No. 2 is therefore kept "mal positions.

tions, the plugs E connect the'battery T with ringing until the call is answered and "the receiver h is lifted from its hook-,lever d., When this is done, both magnets O are energized and the armatu'res O withdrawn from the points P, as shown in Fig. 8. Bbth telephone instruments are then connected together through the battery'U by a circuit passing" through the pl'ate Hot the (listribuiingboard', contact G, part D, lead 1", lead 2 part, D, contact I, wire I, pawl L, plate J, magnet N, magnet O, magnet O of the call-board, magnet N, plate J, pawl L, wire I, contact I, part D, leads 2 and 1*, part D, contact G, plate H to battery U. Both stations are therefore connected for talking and remain in that condition until one ofthe receivers is replaced on its hook, thereby breaking the circuit through both pairs of magnetsNand O, which returns the plates J and plugs 11. to their nor- When in their normal posi' the'leads from the stations through the parts C, I, D, and O, G, and D, therebykeeping the lines constantly energized;

- The station annunciators or calls and the operators telephones may be connected with the line-terminals in any well-known way which will be self-suggestive to one skilled in the art, and I have not shown the same, as they form no part of my invention and their omission simplifies the description.

Changes may be made in the form and arrangement of'parts'without separating from the spirit and scope of my invention; but

What I claim, and desire to protect by Letters Patent of the United States, is

1. An exchange for telephonesystemscomprising switchboards, line-terminals in said boards, connections between said boards and means independent of each other located within said boards at each terminal for connecting any ot'saidterminals with correspondingends ot'said connections.

2. An exchange for telephone systems comprising switchboards, line-terminals in said boards, connections between said boards, slidable contacts for said connections and means independent of each other located prising, a call-board, a distributing-board, 'line-terminalsin each board, connections between the boards, and independent means at each terminal for connecting said terminals and any ofsaid connections.

5. An exchange for telephone systems, comprising-a call-board, a distributingboard,

line-terminals in each board, connections be tween the boards, slidable plates, and independent means adjacent each terminal for connecting said terminals and said slidable plates. p

An exchange for telephonesystems, comprising a calloard, a distributing-board, line-terminals in ach board, connections be tween the boards ind independent movable parts within said boards at each terminal for connecting said 'erminals and said connections. y

i '7. An exchange fortelephone systems, comprising a call-board, a distributing-board, line-terminals in each board, connections between the boards, said connections having slidable contacts adjacent the line-terminals in each board and independent means corresponding to each terminal for connecting said terminals and said slidable contacts.

8. An exchange for telephone systems comprising, a call-board, a distributing-hoard, line-terminals in each board connections between the boards,said connections having contacts adjacent the line-terminals in each board and independent movable parts in permanent connection with each pair of terminals for connecting said terminalsand said contacts.

9. An exchange for telephone systems com- 1 prising, a call-board, a distributing-board,

line-terminals in each board,'connections between ,the boards, said connections having slidable contacts adjacent all the line-terminals in each board and independent movable parts in permanent connection with each terminal for connecting said terminals and said contacts. 1

10. An exchange for telephone systems comprising a call-board, a distributing-board, line-terminals in eachboard, connections between the boards,each connection having contacts in each board a part of each contact being adjacent every terminal in its corresponding board, means for rendering each contact inoperative in regard to-every terminal. ex-' cept one, and movable parts in connection with each terminal forconnecting said terminals and said contacts.

11. An exchange for telephone systems comprising, a callboard, a distributing-board, line-terminals in eachboard, connections between the boards, each connection having contacts in each board, gmovable parts in connection with each terminal, and means for automatically connecting said terminals with any one of said contacts which is notin use.

12. An exchangefortelephonesystemscomprising, a call-board, a distributing-board,

line-terminals in each board, connections be tween the boards each having cont-acts which are adjacent every terminal in each board, movable parts in connection with each terminal, and means for automatically selecting one of said contacts which is not in use and connecting the same with its terminal.

13. An exchange for telephone systems comprising, a call-board, a distributingboard, line-terminals in each board, connections be tween the boards, each connection having slida'ble plates in each board, a part of which is adjacent every terminal -in eachboard, movable parts in permanent connection with each terminal, and means for automatically selecting one of said plates and connecting the same with its terminal.

14:. An exchange for telephone systems comprising, a call-board, a distributing-board, line-terminals in each board, connections between the boards, slidable plates in each board corresponding to each board, movable parts in permanent connection with each terminal, means for automatically selecting one of said plates to connect the same with its terminal, and electromagnetic means included in said connections for holding said plates in operative contact with said movable parts.

15. In an exchange for telephone systems,

switchboards,line-terminals connected to saidboards, independent permanent conductors in proximity to and connecting said boards, automatic gripping devices located within Said boards, and movable parts for operating said gripping devices, in combination with means to automatically release said conductors from said gripping devices.

16. An exchange for telephone systems comprising switchboards, lineterminals of the :calling subscribers, line-terminals of the subscribers to be called each connected to said boards, independent permanent conductors in proximity to and connecting said boards, holes .or perforations in said boards for each ofsaid terminals, means located in each of said holes or perforations to connect automatically said terminals with any of said independent conductors, movable parts for operating said means, and automatic means to release saidconnecting means.

17. In an exchange for telephone systems,

call andswitch boards, a series of movable minals with any of said independent conductors, means for operating said. 'ripping de- Vices, andautomatic means to disconnect said gripping devices from said conductors.

I 19. An exchange for telephone systems comprising, a call-board, a distributing-board, line-terminals in each board, connections between the boards, each connection having movable contacts in each board a part of each contact being adjacent every terminal in its corresponding board, and movable parts in connection with each terminal for connecting said terminals with any of said contacts.

20. An exchange fortelephonesystemscomprising, a call-board, a distributing-board, line-terminals in each board, connections between the boards, each connection having slida'ble contacts in each board,,a part of each contact being adjacent every terminal in its corresponding board, means for sliding said contacts and holding them in position, and inovable parts in connection with each terminal for connecting said terminals with any of said sliding contacts.

21. Anexchange fortelephonesystems comprising, a call-board, a distributing-board,

' line-terminals in each board, connections between the hoards, slidable frames or plates in each board for each connection, a part of each frame or plate being adjacent every terminal in its corresponding board, means for sliding said frames and for holding them in operative or inoperative position, and slidable plugs in connection with each terminal for connecting said terminals with any of said frames or plates.

22. An exchange for telephone systems comprising, a call-board, a distributing-board, line-terminal in each board, plugsockets for each terminal, a plug for each socket, fixed conductors having parts adjacent each of said plugs, a battery connected between said conductors, a slidable contact carried by each plug adapted to con nect one of said conductors and a plug-socket, pawls carried by each plug, a series of slidable conductive plates adapted to be engaged by any of said pawls, connections between the plates of the difierent boards, magnets controlled by said pawls for drawing said plates into operative position, electromagnetic clearing-out devices also controlling said magnets, projections carried by each slidable plate to render said clearingout devices inoperative when said plates are in their normal positions, contacts in the dis- .tributing-board adapted to engage said projections and thereby close a ground-circuit and batteries in said ground-circuit.

In testimony whereof I hereby sign my name, in the presence of two subscribing witnesses, this'28th day of January, A. D. 1901.

ISIDOR KITSEE.

Witnesses: w EDITH R. STITLEY, WALLACE B. ELDRIDGE. 

